I didn't notice any difference after consuming 2 bottles. However, it got some really good ingredients such as lutein, zeaxanthin and astaxanthin, and has no magnesium stearate. I find Source Naturals, Zeaxanthin with Lutein is slightly better in improving my vision, but it has no astaxanthin and contains magnesium stearate. I will continue to take Dr. Mercola's Eye Support for maintenance purpose.

Am going through my second order now, so I have reordered this and probably will continue to do so, and for what it has in it which you can look up, is fantastic. The reason I am giving it four stars instead of 5 is because it is pricey, maybe not a concern for you. The ingredients in it are terrific as I have said, but only four of them. I just wish one or two more eye supplement ingredients were in it as well considering the price.